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Glow-worm gas fire thermocouple S900005 (T34-900/M8/NP)

Thermocouple

Glow-worm gas fire thermocouple S900005 (T34-900/M8/NP)

Genuine-pattern pilot thermocouple for Glow-worm Opus and Opulence gas fires, manufacturer part S900005.

At a glance

  • Also known as 1700415
  • Gas Safe registered engineer required for fitting
Manufacturer part no.
T34-900/M8/NP
Showing prices

£36.26

£30.22 ex. VAT · VAT at 20%

Available to order · 1 working day
Available to order · 1 working day
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

A pilot-flame safety thermocouple made to fit Glow-worm gas fires, under manufacturer part number S900005. It sits in the pilot flame and generates a small millivolt signal that holds the fire's gas valve open, shutting off the gas automatically if the pilot goes out.

Signs this part needs replacing

  • Pilot light won't stay lit once you release the control knob
  • Main burner won't ignite despite a visible pilot flame
  • Weak or unstable millivolt reading when tested
  • Corrosion, scorching or a damaged lead on the existing thermocouple

Before you order

  • Check the part number or gas code on your existing thermocouple against S900005
  • Isolate the gas supply before removing the old thermocouple
  • Confirm your fire model against the codes above if unsure
  • Gas Safe registered engineer required for fitting

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.